reconfigureItems(_:)
Updates the data for the items you specify in the snapshot, preserving the existing cells for the items.
Declaration
mutating func reconfigureItems(_ identifiers: [ItemIdentifierType])Parameters
- identifiers:
An array of identifiers corresponding to the items to update data for in the snapshot.
Discussion
To update the contents of existing (including prefetched) cells without replacing them with new cells, use this method instead of reloadItems(_:). For optimal performance, choose to reconfigure items instead of reloading items unless you have an explicit need to replace the existing cell with a new cell.
Your cell provider must dequeue the same type of cell for the provided index path, and must return the same existing cell for a given index path. Because this method reconfigures existing cells, the collection view or table view doesn’t call prepareForReuse for each cell dequeued. If you need to return a different type of cell for an index path, use reloadItems(_:) instead.
If your cells are self-sizing, the collection view or table view resizes your cells after reconfiguring them.
Set the animatingDifferences parameter to tell the collection view or table view whether to animate any size or layout changes that are a result of reconfiguration when you apply the snapshot to your data source. To avoid animations when setting specific properties, use performWithoutAnimation(_:) in your cell configuration logic.
If your collection view or table view uses a diffable data source, use this method. If your collection view uses a custom implementation of UICollectionViewDataSource, use reconfigureItems(at:) instead. If your table view uses a custom implementation of UITableViewDataSource, use reconfigureRows(at:) instead.